5-bromopyrazine-2-carboxylic acid

Borax, also known as "borax", is a mineral medicine obtained from the extraction of natural ores. Its main use, which was widely covered in ancient times, is described in ancient Chinese as follows:
Medical use: Borax has the effect of clearing away heat and detoxifying, reducing swelling and antiseptic, and is mostly used for diseases such as laryngeal paralysis, mouth sores, red eyes, swelling and pain. "Compendium of Materia Medica" says: "Borax, sweet in taste, slightly salty, cold in nature, and non-toxic. Treat scorched phlegm and heat, generate body fluid, remove breath, eliminate obstruction, remove diaphragm and nausea, build-up and bruising flesh, broken bones and choking, sores and mouth and teeth diseases." For those with swollen throats, use borax in combination with borneol, Xuanming powder, cinnabar, etc., and blow on the throat at the end of the study, which can reduce swelling and relieve pain, such as ice boron powder. If there are sores on the mouth and tongue, it can also clear away heat and reduce sores.
Alchemy and Refining: In Taoist alchemy techniques, borax also has its uses. Because borax can melt metal oxides when heated, and help the extraction and separation of metal elements in ores, alchemists often use it as an auxiliary, hoping to refine miraculous pills for longevity or obtain strange effects. Although the method does not exist today, it is indeed an important material in ancient alchemy and refining.
Printing and Dyeing: In the matter of fabric printing and dyeing, borax also has wonders. It can be used as a mordant to help the dye adhere to the fabric fibers, making the dyeing more uniform and firm, and the color is fresh and lasting. In this way, the color of the fabric is not easy to fade after wearing and washing, and it is beautiful.
In addition, borax is also occasionally used in food preservation, metal welding, etc. However, it should be noted that borax has certain toxicity, excessive intake or improper use can easily endanger human health. At present, due to safety concerns, its use has been restricted or prohibited in many fields. Although it has various uses in the past, the choice today is based on health and safety.

The method of making butyric acid has been known in ancient times, and it depends on all kinds of wonderful techniques to get this good product.
First, take milk as the source, and the magic method is to coagulate it. Take fresh milk first, put it in a purifier, and expose it to the sun or a warm place. Over time, the milk grows in bacteria, and gradually changes the milk quality. Its milk gradually coagulates, like a paste like fat. Then, drain it with a cloth, remove its clear liquid, and leave its clot. This clot initially contains the base of butyric acid, and then it can be treated to obtain butyric acid.
Second, leaven it. Choose yeast and put it in a sugary liquid to nourish it. After that, take the lipid-containing materials, such as emulsifiable concentrate, and enter the fermentation liquid. Yeast has strong vitality, which prompts the biochemical reaction of the material. After several days of work, the material gradually changes, and butyric acid is formed in between. At this time, by distillation, its components can be analyzed to obtain pure butyric acid.
Third, by chemical method. Put suitable raw materials, such as acids and alcohols, in a certain proportion in the kettle. Add an appropriate catalyst to control its temperature and pressure. All substances undergo chemical changes in the kettle, molecular recombination, and gradually produce butyric acid. After the reaction is completed, the separation technique is used to remove its impurities to obtain the finished product of butyric acid. The chemical method requires precise control of conditions in order to make the yield high and the quality excellent.
All kinds of production methods are exquisite. Those who make milk are derived from nature; those who make leaven are borrowed from the power of microorganisms; those who combine laws and methods are based on chemical principles. They are all good recipes for making butyric acid. Craftsmen should choose and use them according to their needs to make good butyric acid.

At present, the price of borax in the city varies according to its quality and market conditions. Borax has a wide range of uses and is used in many fields such as industry, medicine, and daily necessities, so its price is also affected by many factors.
In the field of industry, borax is a commonly used raw material, such as the firing of glass and ceramics. The properties of adjustable products increase its heat resistance and wear resistance. For this purpose, its demand is stable and the price is relatively stable. If the industry is prosperous and the demand for borax increases greatly, the price may rise; if the industry is sluggish and the demand decreases, the price may decline.
In medicine, borax has the effect of disinfection and anti-corrosion, and can be used in the preparation of pharmaceuticals. Because it is related to people's livelihood and health, its quality control is quite strict, and the price of borax for such purposes is often higher than that of other uses. However, the demand for borax in the pharmaceutical market mostly varies according to the regulations of the pharmaceutical industry and the epidemic situation of diseases. If epidemics occur frequently, the demand for borax with disinfection and anti-corrosion may rise, and the price will fluctuate accordingly.
In daily use, borax can be used in detergents, cosmetics, etc. This type of market is highly competitive, and the price of borax is also affected by costs and competing products. If the price of raw materials rises, or competing products come out of different markets, the price of borax may change.
In summary, the market price of borax can range from tens of dollars per catty to hundreds of dollars per catty. Its price often changes with time. If you want to know the exact price, you need to carefully observe the market conditions and know its supply and demand in order to obtain the exact number.

Borax is a natural mineral medicine with unique physical and chemical properties and important uses in many fields.
In terms of physical properties, borax is often colorless and translucent crystals, or white crystalline powder. Its crystal morphology is mostly columnar or granular, with a glassy appearance and brittle and brittle. The density of borax is about 1.73 g/cm3, which is relatively light. And its hardness is low, with a Mohs hardness of about 2-2.5, which can be scratched on the surface by nails. Borax has a certain solubility in water, and when the temperature increases, the solubility increases significantly. At room temperature, 100 grams of water can dissolve about 2.7 grams of borax.
As for the chemical properties, borax is chemically called sodium tetraborate decahydrate, and the chemical formula is Na ² B O · 10H ² O. Borax aqueous solutions are weakly alkaline because they can hydrolyze in water to produce hydroxide ions. Borax can react with acids to form boric acid. For example, when reacted with hydrochloric acid, boric acid and sodium chloride are formed: Na ² B O + 2HCl + 5H ² O = 4H 🥰 BO 🥰 + 2NaCl. Borax can also react with metal ions to form stable complexes. This property makes it often used as a masking agent for metal ions in analytical chemistry. Borax will gradually lose its crystalline water when heated. When heated to 350-400 ° C, it will completely lose its crystalline water and become anhydrous borax (Na ² B O). Continued heating, anhydrous borax will melt into a glassy substance, which can dissolve a variety of metal oxides. Therefore, in the metallurgical industry, borax is often used as a flux.

Acid, the things that are destroyed are also in the process of hiding, and it is impossible to pay attention to things like this.
The first word to hide, acid has the property of decay, so the equipment should be careful. Glass, ceramics, plastic and other resistant materials should be used. If gold equipment is used, it is easy to be rotten and cause leakage. And hide it, and it is dry and dry, and it should be protected from direct light, so as to prevent its decomposition or damage. In addition, it is not allowed to be the same as nature and oxidation, in order to prevent the reaction of the strong.
The second time and the time, the people who are damaged will be affected by the damage, the nature, the danger and the urgent method. The ship of the world is secret and resistant, and the leakage on the way is guaranteed. Unloading and unloading, operation, avoid collision and collapse. And on the way, it is advisable to have a warning so that others know the danger. If there is an unfortunate leakage, it is an urgent measure. A small amount of leakage can be adsorbed by sand, dry lime, etc.; if there is a large amount of leakage, it is necessary to evacuate the crowd, seal the building, and deal with it.
In this case, it is safe to store the acid. If you don't hide the equipment, the place, or the person, and the leak prevention, you can keep it safe.